Rapid measuring method for carbon acetate stable isotope in table vinegar
A stable isotope, rapid determination technology, applied in measuring devices, instruments, scientific instruments, etc., can solve the problems of time-consuming and laborious operation, affecting the accuracy of results, etc., and achieve the effect of less sample consumption, simple method, and promotion of technological progress.
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Embodiment 1
[0027] 1 Material method
[0028] 1.1 Instrument
[0029] Triplus autosampler (Thermofisher Company), gas chromatograph (Trace GC, Thermofisher Company), combustion conversion device (IsoLink, Thermofisher Company), stable isotope ratio mass spectrometer (DeltaV Advantage, Thermofisher Company), etc.
[0030] 1.2 Reagents
[0031] Ethanol (domestic chromatographically pure), glacial acetic acid (domestic analytically pure, EA-IRMS calibrated δ 13 C VPDB =-26.41±0.15‰), fruit vinegar (the second round of international comparison samples of FIT-PTS in 2011).
[0032] 1.3 Chromatographic conditions
[0033] Wax capillary column (30m×0.25mm×0.25μm); the carrier gas is helium; the column flow rate is 1.2mL / min; the inlet temperature is 300°C; The temperature was raised to 200°C and kept for 2 minutes; the injection volume was 1 μL; the split ratio was 20:1.
[0034] 1.4 Acetic acid conversion conditions
[0035] Ceramic (Al 2 o 3 ) oxidation tube (fillers are CuO, NiO and ...
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